Dark data is the information companies store but rarely use—about 60% to 80% of...

https://mike-wiki.win/index.php/Why_Keeping_Dark_Data_on_Flash_Wastes_Your_Storage_Budget

Dark data is the information companies store but rarely use—about 60% to 80% of it sits inactive. This hidden data can waste millions, create security risks, and muddy AI projects by adding irrelevant noise